package com.nowcoder.community.service;

import com.nowcoder.community.dao.LoginTicketMapper;
import com.nowcoder.community.dao.UserMapper;
import com.nowcoder.community.entity.LoginTicket;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.MailClient;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;

@Service
public class UserService implements CommunityConstant {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private MailClient mailClient;

    @Autowired
    private TemplateEngine templateEngine;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${community.path.domain}")
    private String contextPath;

    public User findUserById(int id) {
        return userMapper.selectById(id);
    }

    @Autowired
    private LoginTicketMapper loginTicketMapper;

    public Map<String,Object> register(User user) {
        Map<String,Object> map=new HashMap<>();

        //空值处理
        if(user == null ) {
            throw new IllegalArgumentException("参数不能为空！");
        }

        if (StringUtils.isBlank(user.getUsername())) {
            map.put("usernameMsg","账号不能为空！");
            return  map;
        }
        if (StringUtils.isBlank(user.getPassword())) {
            map.put("passWordMsg","密码不能为空！");
            return  map;
        }
        if (StringUtils.isBlank(user.getEmail())) {
            map.put("emailMsg","邮箱不能为空！");
            return  map;
        }
            //验证账号
        User u=userMapper.selectByName(user.getUsername());
        if (u != null) {
            map.put("usernameMsg","该账号已存在！");
            return map;
        }

        //验证邮箱
         u=userMapper.selectByEmail(user.getEmail());
        if (u != null) {
            map.put("emailMsg","该邮箱已被注册！");
            return map;
        }

        //注册用户
        user.setSalt(CommunityUtil.generateUUID().substring(0,5));
        user.setPassword(CommunityUtil.md5(user.getPassword()+user.getSalt()));
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("http://images.nowcoder.com/head/%dt.png", new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.insertUser(user);

        //  激活邮件
        Context context=new Context();
        context.setVariable("email",user.getEmail());

        String url=domain+contextPath+"/activation"+user.getId()+"/"+user.getActivationCode();
        context.setVariable("url",url);
        String content=templateEngine.process("/mail/activation",context);
        mailClient.sendMail(user.getEmail(),"激活账号",content);

        return map;
    }

    public int activation(int userId,String code) {
        User user= userMapper.selectById(userId);
        if(user.getStatus() ==1){
            return ACTIVATION_REPEAT;
        }else if (user.getActivationCode().equals(code)) {
            userMapper.updateStatus(userId,1);
            return ACTIVATION_SUCCESS;
        }else {
            return ACTIVATION_FAILURE;
        }
    }

    public Map<String,Object> login(String username,String password,int expiredSeconds){
        Map<String,Object> map= new HashMap<>();

        //空值处理
        if (StringUtils.isBlank(username)) {
            map.put("usernameMsg","账号不能为空!");
            return map;
        }
        if (StringUtils.isBlank(password)) {
            map.put("passwordMsg","密码不能为空!");
            return map;
        }

        //验证账号
        User user =userMapper.selectByName(username);
        if (user ==null){
            map.put("usernameMsg","该账号不存在");
            return map;
        }

        //验证状态
        if( user.getStatus() == 0) {
            map.put("usernameMsg","该账号不存在");
            return map;
        }

        //验证密码
        password= CommunityUtil.md5(password+user.getSalt());
        if(!user.getPassword().equals(password)) {
            map.put("passwordMsg","密码不正确！");
            return map;
        }
        //生产登录凭证
        LoginTicket loginTicket =new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis()+expiredSeconds+1000));
        loginTicketMapper.insertLoginTicket(loginTicket);

        map.put("ticket",loginTicket.getTicket());
        return map;
    }

    public void logout(String ticket) {
        loginTicketMapper.updateStatus(ticket,1);
    }

    public  LoginTicket findloginTicket(String ticket) {

        return loginTicketMapper.selectByTicket(ticket);
    }

    public int updateHeader(int userId,String headerUrl) {
        var updateHeader = userMapper.updateHeader(userId, headerUrl);
        return updateHeader;
    }
}
